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The Goodman 10123538 is a genuine OEM manual reset limit switch (flame rollout switch) for the Goodman ACVC960603BNAA 96% AFUE variable-speed gas furnace. This is a critical safety control: it monitors for abnormal heat or flame rollout at the burner area and shuts off the furnace if an unsafe temperature is detected. Because it is a manual-reset device, it stays tripped until a technician presses the reset button, ensuring the underlying fault is addressed before the furnace runs again.
As a safety-rated control, the trip temperature and reset behavior must match factory specification. Genuine Goodman OEM ensures the correct setpoint and bracket fit. A mismatched generic switch can trip at the wrong temperature — either nuisance-tripping or, worse, failing to protect against rollout. For safety components, always use OEM.
Moderate (3/5) — Requires removing two spade wire connectors and mounting screws, then transferring to the new switch. Confirm the failure cause before replacing. Disconnect power and shut off gas before servicing; if unsure, consult a licensed HVAC technician.